INVESTIGATING THE EFFECT OF DOUBLE EXCLUSIVE OR OPERATION IN TRIPLE DATA ENCRYPTION ALGORITHM

Abstract

Data encryption standard is an essential and efficient component to ensure the secure communication between the different entities by transferring information that only the authorized recipient can access. The assurance of the lack of access of unauthorized users to sensitive data is the most important challenges regarding data distribution in internet. The method employed involves the design of triple data encryption algorithms (TDEA) with double exclusive OR operation that uses three and two keys. These keys perform operation on data thrice more than more what data encryption does. The results obtained reveals that the triple data encryption algorithm with double exclusive OR (DXOR) execution speed was faster than triple data encryption algorithm without DXOR and it also consumes more memory to initialize the sub keys than the TDEA without DXOR. Also, the results obtained shows that for a file size of 1 MB, the average response time for data encryption algorithm (DEA) = 0.15s, TDEA (3KEYS) = 0.45s, TDEA (3KEYS) + DXOR = 0.31s, TDEA (2KEYS) = 0.31s and TDEA (2KEYS) + DXOR = 0.27s whereas for a file size of 15MB, the average response time for DEA = 2.13s, TDEA (3KEYS) = 6.51s, TDEA (3KEYS) + DXOR = 6.13s, TDEA (2KEYS) = 4.09s and TDEA (2KEYS) + DXOR = 3.62s. In conclusion, the effect of double exclusive OR operation in existing triple data encryption algorithm was investigated to improve the security and avalanche features of the conventional data encryption standards.